Xorg growing bigger and bigger?

If you find out that Xorg grows bigger and bigger with time, chances are high that this is not actually Xorg, but a program that uses its pixmap cache.

xrestop will tell you just that. It lists the applications by how much pixmap cache they use. Mine starts with "" using about 226 MB(!), looking up the process id shows that "" stands for plasma! (Nice try at hiding, budddy!)